Safely Neutralize Bleach

Someone spilled a jug of bleach down the hall and it's making the hallway smell really bad. Is there any chemical that can be dumped on it that will safely neutralize the smell or the chemical itself without producing another gas or a worse chemical?

Yep, Na2SO3 is even better than H2O2, good that this one is mentioned as well.

It is called sodium sulfite. At shops, which sell stuff for making wine, you can also buy sodium metabisulfite, Na2S2O5, or potassium metabisulfite, K2S2O5. These also are suitable, but they are somewhat more smelly. This smell, however, does not stick to everything and quickly disappears. At low concentration, I do not find that smell (SO2) unpleasant. At high concentration it becomes pungent though.